298 lines
8.6 KiB
C++
298 lines
8.6 KiB
C++
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#include "shellprv.h"
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#include "EBalloon.h"
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class CErrorBalloon
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{
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public:
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CErrorBalloon();
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~CErrorBalloon();
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HRESULT ShowToolTip(HINSTANCE hInstance, HWND hwndTarget, const POINT *ppt, LPTSTR pszTitle, LPTSTR pszMessage, DWORD dwIconIndex, int iTimeout);
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void HideToolTip(BOOL fDestroy);
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protected:
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HWND _CreateToolTipWindow(HWND hwnd);
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static LRESULT CALLBACK _SubclassTipProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uID, ULONG_PTR dwRefData);
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HWND _hwndTarget; // the targeted control hwnd
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HWND _hwndToolTip; // the tooltip control
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UINT_PTR _uTimerID; // the timer id
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};
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#define ERRORBALLOONTIMERID 1000
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#define EB_WARNINGBELOW 0x00000000 // default value. Balloon tooltips will be shown below the window by default.
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#define EB_WARNINGABOVE 0x00000004 // Ballon tooltips will be shown above the window by default.
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#define EB_WARNINGCENTERED 0x00000008 // Ballon tooltips will be shown pointing to the center of the window.
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CErrorBalloon::CErrorBalloon()
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{
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// our allocation function should have zeroed our memory. Check to make sure:
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ASSERT(0==_hwndToolTip);
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ASSERT(0==_uTimerID);
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}
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CErrorBalloon::~CErrorBalloon()
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{
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ASSERT(0==_hwndToolTip);
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ASSERT(0==_hwndTarget);
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}
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LRESULT CALLBACK CErrorBalloon::_SubclassTipProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uID, ULONG_PTR dwRefData)
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{
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UNREFERENCED_PARAMETER(uID);
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CErrorBalloon * pthis = (CErrorBalloon*)dwRefData;
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switch (uMsg)
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{
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case WM_MOUSEACTIVATE: // Never activate tooltip
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pthis->HideToolTip(FALSE);
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return MA_NOACTIVATEANDEAT;
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case WM_DESTROY:
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pthis->HideToolTip(TRUE);
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delete pthis;
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break;
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case WM_TIMER:
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if (wParam == ERRORBALLOONTIMERID)
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{
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pthis->HideToolTip(FALSE);
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return 0;
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}
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break;
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default:
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break;
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}
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return DefSubclassProc(hwnd, uMsg, wParam, lParam);
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}
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HRESULT CErrorBalloon::ShowToolTip(HINSTANCE hinst, HWND hwndTarget, const POINT *ppt, LPTSTR pszTitle, LPTSTR pszMessage, DWORD dwIconIndex, int iTimeout)
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{
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if (_hwndToolTip)
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{
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HideToolTip(FALSE);
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}
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HWND hwnd = _CreateToolTipWindow(hwndTarget);
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if (hwnd)
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{
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int x, y;
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x = ppt->x;
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y = ppt->y;
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SendMessage(hwnd, TTM_TRACKPOSITION, 0, MAKELONG(x,y));
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if (pszTitle)
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{
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SendMessage(hwnd, TTM_SETTITLE, (WPARAM)dwIconIndex, (LPARAM)pszTitle);
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}
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TOOLINFO ti = {0};
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ti.cbSize = TTTOOLINFOW_V2_SIZE;
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ti.hwnd = hwnd;
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ti.uId = 1;
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ti.lpszText = pszMessage;
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SendMessage(hwnd, TTM_UPDATETIPTEXT, 0, (LPARAM)&ti);
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// Show the tooltip
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SendMessage(hwnd, TTM_TRACKACTIVATE, TRUE, (LPARAM)&ti);
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_uTimerID = SetTimer(hwnd, ERRORBALLOONTIMERID, iTimeout, NULL);
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if (SetWindowSubclass(hwnd, CErrorBalloon::_SubclassTipProc, (UINT_PTR)this, (LONG_PTR)this))
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{
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_hwndToolTip = hwnd;
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return S_OK;
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}
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// we blew the subclassing
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DestroyWindow(hwnd);
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}
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return E_FAIL;
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}
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// CreateToolTipWindow
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//
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// Creates our tooltip control. We share this one tooltip control and use it for all invalid
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// input messages. The control is hiden when not in use and then shown when needed.
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//
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HWND CErrorBalloon::_CreateToolTipWindow(HWND hwndTarget)
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{
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HWND hwnd = CreateWindow(
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TOOLTIPS_CLASS,
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NULL,
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WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP | TTS_BALLOON,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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hwndTarget,
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NULL,
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GetModuleHandle(NULL),
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NULL);
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ASSERT(!_hwndToolTip);
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ASSERT(!_hwndTarget);
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if (hwnd)
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{
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TOOLINFO ti = {0};
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ti.cbSize = TTTOOLINFOW_V2_SIZE;
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ti.uFlags = TTF_TRACK;
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ti.hwnd = hwnd;
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ti.uId = 1;
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// set the version so we can have non buggy mouse event forwarding
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SendMessage(hwnd, CCM_SETVERSION, COMCTL32_VERSION, 0);
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SendMessage(hwnd, TTM_ADDTOOL, 0, (LPARAM)&ti);
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SendMessage(hwnd, TTM_SETMAXTIPWIDTH, 0, 300);
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// set tink-tink?
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}
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return hwnd;
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}
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void CErrorBalloon::HideToolTip(BOOL fOnDestroy)
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{
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// When the timer fires we hide the tooltip window
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if (fOnDestroy)
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{
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// we need to tear everything down
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if (_uTimerID)
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{
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KillTimer(_hwndTarget, ERRORBALLOONTIMERID);
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_uTimerID = 0;
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}
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if (_hwndTarget)
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{
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// RemoveWindowSubclass(_hwndTarget, CErrorBalloon::_SubclassTargetProc, (UINT_PTR)this);
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RemoveProp(_hwndTarget, L"ShellConditionalBalloon");
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_hwndTarget = NULL;
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}
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if (_hwndToolTip)
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{
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RemoveWindowSubclass(_hwndToolTip, CErrorBalloon::_SubclassTipProc, (UINT_PTR)this);
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SendMessage(_hwndToolTip, TTM_TRACKACTIVATE, FALSE, 0);
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_hwndToolTip = NULL;
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}
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}
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else
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DestroyWindow(_hwndToolTip);
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}
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#if 0
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_GetTipPoint()
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{
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RECT rc;
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GetWindowRect(hwndTarget, &rc);
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POINT pt;
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pt.x = (rc.left+rc.right)/2;
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if ( EB_WARNINGABOVE & dwFlags )
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{
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pt.y = rc.top;
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}
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else if ( EB_WARNINGCENTERED & dwFlags )
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{
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pt.y = (rc.top+rc.bottom)/2;
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}
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else
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{
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pt.y = rc.bottom;
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}
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}
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#endif
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STDAPI SHShowConditionalBalloon(HWND hwnd, CBSHOW show, CONDITIONALBALLOON *pscb)
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{
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HRESULT hr = E_OUTOFMEMORY;
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if (hwnd)
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{
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CErrorBalloon *peb = (CErrorBalloon *) GetProp(hwnd, L"ShellConditionalBalloon");
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if (show != CBSHOW_HIDE && pscb)
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{
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DWORD dw = 0;
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BOOL fShow = TRUE;
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HKEY hkSession = NULL;
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if (SUCCEEDED(SHCreateSessionKey(MAXIMUM_ALLOWED, &hkSession)))
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{
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fShow = (ERROR_SUCCESS != SHGetValue(hkSession, NULL, pscb->pszValue, NULL, NULL, NULL));
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}
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// check cLimit
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if (fShow && pscb->cLimit)
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{
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ASSERT(pscb->hKey);
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DWORD cb = sizeof(dw);
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SHGetValue(pscb->hKey, pscb->pszSubKey, pscb->pszValue, NULL, &dw, &cb);
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fShow = dw < pscb->cLimit;
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}
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if (fShow)
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{
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// we need to show something
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if (!peb)
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{
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peb = new CErrorBalloon();
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if (peb && !SetProp(hwnd, L"ShellConditionalBalloon", peb))
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{
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delete peb;
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peb = NULL;
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}
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}
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if (peb)
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{
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TCHAR szTitle[MAX_PATH];
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TCHAR szMessage[INFOTIPSIZE];
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LoadString(pscb->hinst, pscb->idsTitle, szTitle, ARRAYSIZE(szTitle));
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LoadString(pscb->hinst, pscb->idsMessage, szMessage, ARRAYSIZE(szMessage));
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// Set the tooltip display point
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//if (pscb->pt.x == -1 && pscb->pt.y == -1)
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// _GetTipPoint(hwndTarget, &pscb->pt);
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DWORD dwMSecs = pscb->dwMSecs;
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if (dwMSecs == 0)
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{
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// default to 1 sec / 10 chars;
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dwMSecs = lstrlen(szMessage) * 100;
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if (dw == 0)
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dwMSecs *= 5; // first time put it up for a while
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}
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hr = peb->ShowToolTip(pscb->hinst, hwnd, &pscb->pt, szTitle, szMessage, pscb->ttiIcon, dwMSecs);
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if (FAILED(hr))
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{
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RemoveProp(hwnd, L"ShellConditionalBalloon");
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delete peb;
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}
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if (pscb->cLimit)
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{
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dw++;
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SHSetValueW(pscb->hKey, pscb->pszSubKey, pscb->pszValue, REG_DWORD, &dw, sizeof(dw));
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}
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}
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}
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else
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hr = S_FALSE;
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if (hkSession)
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{
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SHSetValueW(hkSession, NULL, pscb->pszValue, REG_NONE, NULL, NULL);
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RegCloseKey(hkSession);
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}
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}
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else if (peb)
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{
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peb->HideToolTip(FALSE);
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// we delete ourselves during WM_DESTROY
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}
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}
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return hr;
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}
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